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(上海魏璉工程結(jié)構(gòu)設(shè)計(jì)事務(wù)所深圳部 深圳 518034)
【提要】 采用兩種有限元模型分析了高層框筒結(jié)構(gòu)中，單向梁樓蓋在豎向和水平荷載作用下的內(nèi)力分布特點(diǎn)。討論了梁端負(fù)鋼筋過密的問題，建議僅在梁上部配置70％的計(jì)算負(fù)筋，其余則配置在梁兩側(cè)10～15倍梁寬范圍的板內(nèi)。分析了在梁端加腋及在筒體周邊設(shè)加強(qiáng)帶對(duì)結(jié)構(gòu)受力的影響，認(rèn)為梁端加腋對(duì)減少在豎向荷載作用下主次梁的跨中撓度有一定作用，但梁端負(fù)彎矩反而增大。分析和工程實(shí)踐表明，筒體角部樓蓋有一定的應(yīng)力集中，常出現(xiàn)早期收縮裂縫，設(shè)計(jì)時(shí)宜適當(dāng)加厚，增加抗裂網(wǎng)筋。
【關(guān)鍵詞】 框筒結(jié)構(gòu) 單向梁樓蓋 實(shí)體有限元分析 加腋梁 加強(qiáng)帶 收縮應(yīng)力
Study on Several Subjects of Floor System Design with Oneway Beam in Tall Frame corewall Structure/Wei Lian, Wang Zhiyuan, Wang Sen, Qiu Kun, Cai Jun(Shanghai Weilian Structure Design Firm Shenzhen Office Representive, Shenzhen 518034,China)
Abstract:The internal force distribution feature of floor system with oneway beam in tall framecorewall structure under vertical  and horizontal load is analyzed with two finite element models. The problem of too dense negative reinforcements at beam end is discussed, and just 70% calculating negative reinforcements are suggested to be set in the upside of the beam, while the left are suggested to be set in the slab with the width of 10～15 times of the beam's. The influence of horizontally haunched beam on the floor system is of advantage to control the deformation and is of disadvantage to reduce the negative bending moment at beam end. The analysis and engineering practice show that shrinkage stress of the floor concentrate in the corner of the corewall, and the thicker slab and mesh
reinforcement for crack control are suggested in design.
Keywords:framecorewall structure； floor system with oneway beam；solid finite eleme
nt analysis； haunched beam； reinforcing band； shrinkage stress